Warp stop-motion for looms.



No. 754,290. PATENTED MABH S, 1904. 0. H. DRAPER.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED DBO. 24, 1903.

H0 MODEL. 2 SHEETS-SHEET 2.

UNITED ST TES Patented March 8, 1904.

P TENT OFFICE.

CLARE H. DRAPER', or 'HOPEDALE, MASSACHUSETTS, ASSIGNOR To DRAPERCOMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

SPECIFICATION forming part of Letters Patent No. 754,290, dated March 8,1904.

Application filed December 24, 1903. Serial No. 186,451. (No model.) i KTo all whom it may concern: 4

Be it known that I, CLARE H. DRAPER, a citizen of the United States, anda resident of Hopedale, county of Worcester, Stateof Massachusetts, haveinvented an Improvement in WVarp Stop-Motions for Looms, of which thefollowing description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing likeparts.

This invention relates more particularly to warp stop motion mechanismfor looms wherein the detectors are normally supported or retained ininoperative position by the warp-threads, failure or undue slackness ofa warp-thread releasing its detector and permitting it to move intoposition to cooperate with a feeler and through suitable means effectthe operation of a stopping instrumentality.

ln my present invention I have provided novel means for operating thefeeler to effect the feeling and non-feeling strokes thereof, and I havealso provided, means to prevent subjection of a released detector to anymaterial strain when engaged by the feeler.

The various novel features of my invention will be fully described inthe subjoined specification, and particularly pointed out in the 1501-lowing claims.

Figure 1 is a transverse sectional 'View of a ortion of a loom havingone embodiment of my invention applied thereto. Fig. 2 is an enlargedview, in rear elevation and looking toward the front of the loom, of themechanism for effecting the movement of the feeler, together with thedevices which serve to actuate a stopping instrumentality upon thearrest of the feeler by a detector released by failure or undueslackness of its warp-thread. Fig.

3 is a sectional detail on the line 3 3, Fig. 2,-

looking toward the left. Fig. 4 is a side view of ,the rockerand hunterto be hereinafter referred to, and Fig. 5 is a perspectiveview of therocker shown in'Fig. 4:. i

in the present embodiment of my invention 1 have shown thewarp-stop-inotion mechanism as belonging to that type wherein thestop-motioncontr0lling detectors also serve as heddles, and in Fig. -1two series or banks of.

stop to support the adjacent edge of-a released detector.

Two parallel rockshafts L are suitably mounted in bearings below theplate or sepa rator 3, and said rock-shafts are provided withrocker-arms 5, which have attached feelers 6.

The rock-shafts t have attached and intermeshing segment-gears -7,'whereby rocking motion imparted to one shaft will be impartedsimultaneously to the other shaft 4, but in the opposite direction, sothat the feelers 6 will be moved toward and from thelower ends of theseries of detectors when the loom isrunning under normal conditions.

By those skilled in the art it will be understood that if a detectorwhen in the lower plane of the shed is released by orthrough failure orundue slackness of its warp-thread suchdetector will drop from theposition shown in Fig. 1, so that its lower end will be in the path ofthe cooperating feeler on the feeling stroke, and the engagement of thefeeler with the detector will arrest the-feeler before it has completedits feeling stroke.

The cam-shaft C of the loom has secured to it a fe'eler-cam C and anadjacent huntercam T, shown as a tappet-cam having two Fig. 3,) to bepartially embraced by the upper hook-like end an of a movable member orlink M, the lower end of the link being pivotally connected at m (seeFig. 1) to an arm m fast on a short shaft on, supported on theloom-frame, such shaft having a knock-off arm m rigidly secured to itand in cooperative engagement with the lower end of the shaft S, thearrangement being such that longitudinal movement of the member or linkM in the direction of the arrow 10, Fig. 1, will operate to release theshipper from its holding-noteh in the usual plate N", to therebyautomatically stop the loom by any suitable belt-shipping orpower-releasing device. (Not herein shown.) The hook m is provided witha bearing-hub 11 (see Fig. 3) on one side, and on the opposite side thehook is extended to form a yoke 12, having a hearing at 13 in alinementwith the bearing 11, and below such bearing the yoke is extended to forma stop 14: for a purpose to be described. 7

A rock-shaft 15 is extended through and supported in the bearings 11 and13 and is surrounded by a spiral spring 16, one end of which is securedto the yoke, while'theother end of the spring is attached to a collar17, fast on the rock shaft. The spring is so wound as to normally turnthe rock-shaft in the direction of the arrow 18, Fig. 3.

A follower 19 is made fast on the rock-shaft 15, as by aset-screw 20,(see Fig. 2,) adjacent the bearing 11, said follower being heldincooperative relation with the feeler-cam C by the action of the spring16, whereby rotation of the cam-shaft 0" will rock the shaft 15,

such rocker being efi'ected twice for each revolution of the cam-shaft.The follower is extended below the rock-shaft 15 and then turnedlaterally to form an elongated tail 21, which,'as shown in Figs. 2 and3, is located below the nearer portion of the hooked end or head on ofthe link. This tail constitutes an impact member which moves with thefeeler and which operates to effectthe normal feeler movement in amanner to be described.

A rocker 22 (shown separately in Figs. 4: and 5) has hubs 23 24 on itsopposite sides to receive and rock loosely on theshaft 15 between thebearing portion 13 of the yoke and the nearer side of the link-head m,the rear end of the rocker being upturned and provided with a boss 25,having a hole 26 through it to receive the lower end'of a connecting-rod27,

.the upper end of the 'rod being hooked at 28 to form a pivotalconnection with an arm 29,

fast on one of the feeler rock-shafts 4. (See Figs. 1 and 2.) The hub 24of the rocker is cut away for a portion 'of its periphery to present twoopposed shoulders 30 and 31, be

tween which extends the tail 21 of the fol-' slower, the distancebetween the shoulders permitting considerable lost motid'n between thetail and shoulders, as will be manifest from Fig. 3. The rocker hassecured to or formed and attached at one end to a collar 34, fast onsuch rock-shaft, the other end of the spring being secured to one of thebearings, as 4: for the rock-shaft. The spring is so wound that it tendsto throw the feelers outward or away from the detectors and to act as acushion when the feelers are moved inward on their feeling stroke.

Referring to the drawings, particularly Figs. 1, 2, and 3, wherein thefeelers are represented as ready to begin their inward stroke when therotation of the camshaft (1 carries the feeler-cam C forwardsufficiently to permit the feeler 19 to rock inwardtoward the cam-shaft,the tail 21 will be lifted and will hit the shoulder 30 of the rockerwith a smart blow, the impact thereof being sufficient to turn therocker on its fulcrumviz. the shaft l5-in the direction of arrow 18 andelevate the connecting-rod 27. This moves the feelers inward toward thedetectors, the momentum due to the blow being suflicient to overcome theresistance of the spring 33 and complete the feeling stroke under normalconditions.

hen the continued rotation of the cam-shaft brings the other highportion of the cam G into engagement with the follower, the latter isswung toward the rear of the loom, compressing the spring 16, and thenthe tail 21 hits the rocker-shoulder 31, and the rocker is returned tothe position shown in the drawings, assisted by the action of spring 33and assuming such position before the impact member or tail 21 reachesits final position, as shown in Fig. 3. Movement of the rocker in thedirection just noted-that is, opposite to the arrow 18--is limited bymeans of a stop 35 on the rocker, which stop brings up against thedownward extension 14 of the yoke 12. The timing of the parts is soarranged that normally the turning of the rocker to effect the feelingstroke of the feelers will be in time to depress the hunter 32 beforeone of the tappets t reaches it, the return movement of the rocker tothe position shown in Fig. 3 moving the bunter back again into the pathof the tappets as the feelers are swung outward or retracted.

-VVhen a detector is released and descends into the path of the feeleron the feeling stroke, it engages and arrests the feeler when throwninward, as has been described, and such arrest of the feeler preventsthe hunter 32 from. being moved into inoperative posi tion-that is, outof the path of the advancing tappet t. This nearest tappet will thenengage the hunter and move it to the left, viewing Fig. 3. and suchmovement of the hunter by the tappet-cam is transmitted to the themthefeeler be arrested by a released detector.

Consequently the stress of the follower-spring 16 cannot be transmittedto the released, de-

tector, and subjection otthe latter to injurious strain is obyiated." Asa matter of fact, the

momentum of the rocker and connected feelers is so nearlycounterbalanced'by the resistance of the spring that when 2. releaseddetectoris engaged by'the feeler it receives alight tap, whichneutralizes the eflect of the momentum and permits the spring 33 to act.QTheZt'end ency of this spring is to move the feeler away from thedetector and to move the bunter 32 more completely into'operative'position with relation-to the hunter-cam T. It follows thatif the released detector should from any cause be lifted above'thefeeler after engagement therewith the stopping instrumen talitywillstill be operated, inasmuch as such mentality'is not dependent upon acontinued engagement of feeler and detector,- as has been shown, theaction of the stop-motion is Patent, is' p v 1. In a warp stop-motionforj looms,a seriesmade'more sure and exact.

-'So far .as I am aware the operation of the feeler in awarp-stop-motion mechanism by momentum superinduced by a blow upon arocking part connected with the feeler is broadly new, arid my inventionaccordingly-is not restricted to the prccise'construction andarrangement herein shown and described.

Having fullydescribed my invention, what I claim as new, and desire tosecure by Letters of detectors, a feeler to cooperate, with a de tector.released by failure .of its warp-thread, rotating feeler and buntercams, a member adapted to be moved to effect the operation of a stoppinginstrumentality, a rocker mounted on said member and v operativelyconnected with the feeler, a hunter governed by the rocker, a followerfulcrumed on the movable member and cooperating with the feeler-cam, andmeans acting through the follower to oscillatethe rocker by intermittentimpact thereon, to therebvmove the feeler toward and away from thedetectors, arrest of the feeler by a released detector instantlyactingthrough I the rocker to cause cooperation of the hunter with thebunter-cam, to move said movable member.

2. In a warp stop-motion for looms, a series of detectors, a feeler tocooperate with a detectorreleased by failure of its warp-thread,

rotating feeler and bunter cams, a'member adapted to be moved to effectthe operation of a stopping instrumentality, a rocker mounted on saidmember and operatively connected through the follower to oscillate therocker by intermittent impact thereon, to thereby move the feeler towardand away from thedetectors,

arrest ofthe feeler by a released detector in stantly acting through therocker to cause cooperation of the hunter with the hunter-cam,

to move said movable member. 3. In a warp stop-motion for looms, a serieof detectors, a feeler to cooperate with a detector released by failureor undue slackness of its warp-thread, rotating feeler and bunter cams,a link longitudinally movable to effect the operation of a stoppinginstrumentality, a rocker mounted on said link and operatively connectedwith the feeler, a hunter governed by the rocker, a follower fulcrumedon thelink and cooperating with the feeler-cam, and means acting throughthe follower to oscillate the rocker by. intermittent impact thereon, tothereby move the feeler toward and away from the-detectors, arrest oftheffeeler bya released detector instantly acting through the rocker tocause cooperation of the buriter with the hunter-cam, and move thelinklongitudinally.

4. In a warp stop-motion for looms, a series of detectors, a feeler tocooperate with adetector released by failure'of its warp-thread,-

rotating feeler and hunter cams a' member adapted to be moved to effectthe operation of I rocker to cause cooperation of the bunter with thebunter-cam,to move said movable member. 5. In a warp stop-motion forlooms, aseries of detectors, a feeler to cooperate with a detectorreleased by failure of its warp-thread,

. rotating feeler and bunter cams, a link movable longitudinally toeffect the operation of a stopping instrumentality, a spring-controlledrock-shaft mounted on the link and having fast upon it afollower tocooperate with the feelercam, a rocker loosely mounted on the rock-shaftand provided with a bunter movable into and out of the path of thebunter-cam, means act' ing through the follower to intermittingly engageand oscillate the rocker by impact therewith, and a connection betweensaid rocker and feeler, to operate the feeler by oscillation of therocker, arrest of the feeler by a released detector instantly causingcooperation of the hunter and bunter-cam, to longitudinally move thelink. v,

6. In a warp'stop-motion for looms, a series of detectors movable intooperative position when released by failure or undue slackness of theirwarp-threads, a vibratable feeler to cooperate with a released detector,momentum-operated means to vibrate the feeler and means adapted to causethe operation of astopping instrumentality by or through engagement ofthe feeler with a released detector.

7 In a warp stop-motion for looms, a series of detectors movable intooperative position when released by failure or undue slackness of theirwarp-threads, a vibratable feeler to cooperate with a released detector,momentum-operated means to move the feeler on its feeling stroke, aspring to cushion such stroke and thereby reduce the impact of thefeeler upon a released detector, and means adapted to cause theoperation of a stopping instrumentality upon engagement of the feelerand a detector.

8. In a warp stop-motion for looms, a series of detectors movable intooperative position when released by failure or undue slackness of theirwarp-threads, a vibratable feeler to cooperatevwith .a releaseddetector, a rocker operatively connected with and to vibrate the feeler,means to overcome the inertia of the rocker by intermittent impacttherewith, the completion of the stroke being due to its mo mentum, amember adapted by its movement to effect the operation of a stoppinginstrumentality, and means to cause movement of said member uponengagement of the feeler with a released detector.

9. In a Warp stop-motion for looms, a series of detectors movable intooperative position when released by failure or undue slackness of theirwarp-threads, a vibratable feeler to cooperate with a released detector,means to positively initiate the movement of the feeler toward thedetectors, the completion of such movement being due to momentum of themoving parts, and a member adapted to cause the operation of a stoppinginstrumentality upon such engagement.

10. In a warp stop-motion for looms, a series of detectors, a feeler tocooperate with a detector released by failure of its warp-thread,

rotating feeler and bunter cams, a link movable longitudinally to effectthe operation of a stopping instrumentality, a spring-controlledrock-shaft mounted on the link and having fast upon it'a follower tocooperate with the feeler-cam, a rocker loosely mounted on therock-shaft and provided with a bunter movable into and out of the pathof v the buntercam, opposed shoulders on the rocker, a connectionbetween the latter and the feeler, to operate the feeler by oscillationof therocker, and a tail on the follower extended between the shouldersof the rocker and having a limited movement relative thereto,'wherebythe rocker is oscillated by impact of said tail upon therocker-shoulders, arrest of the feeler by a released detector instantlycausing cooperation of the hunter and bunter-camto longitudinally movethe link. I

1 1. In a warp stop-motion for looms, a series of detectors, a feeler tocooperate with a detector released by failure of its Warp-thread,rotating feeler and bunter cams, a link movable longitudinally to effectthe operation of a stopping instrumentality, a spring-controlledfollower fulcrumed onthe link and cooperating with the feeler-cam, arocker coaxial with the follower and loosely mounted to rock" on thelink, said rocker-having an attached bunter movable into and out ofcooperative relation with the bunter-cam, opposed shoulders on therocker, a laterally-extended impactmemher on the follower and extendedbetween the shoulders and having lost motion between them, and aconnection between the rocker and the feeler to move the latter towardand from the detectors by oscillation of the rocker, engagement of saidimpact member with the shoulders effecting such oscillation, arrest ofthe feeler by a released detector instantly causing cooperation of thebunter and bunteriiaflto effect longitudinal-movement of the 12 In awarp stop-motion forlooms', a'series of detectors, a feeler to cooperatewith adetector released by failure of its warp=thread,

able longitudinally to effect the operation of a stoppinginstrumentality, a spring-controlled follower fulcrumed on the link andcooperati ng with the feeler-cam, a rocker coaxial with the followerand, loosely mounted to rock on the link, said rocker having an attachedbunter movable into and out'of cooperative relation with the bunter-cam,opposed shoulders on the rotating feeler and bunter earns, a link mov-.

rocker, a. laterally-extended impact member on the follower and extendedbetween the shoulders and having lost motion between them, acushion-spring to prevent shock when the feeler engages a releaseddetector, a connection between the rocker and the feeler to move thelatter toward and from the detectors by or through the oscillation oftherocker, engagement of theimpact member with the rocker-shoulderseffecting such oscillation,

and a stop to limit feeler-retracting movement of the rocker, arrest ofthe feeler by a released detector instantly acting to cause cooperationof the bunter and hunter-cam.v

13. In a warpstop-motion for looms, a series of detectors movable intooperative position when released by failure or undue slackness of theirWarp-threads, a vibratable feeler to cooperate with a released detector,means to positively initiate the movement of the feeler toward and awayfrom the detectors, the completion of such movement being due to m0-'mentum' of the moving parts, a spring to adapted to cause the operationof a stopping instrumentality upon such engagement. I

In testimony whereof I have signed my name to this specification in thepresence of two sub- 20 scribing witnesses;

CLARE H. DRAPER.

' Witnesses? GEORGE OTIS DRAPER, E. R. MoRRIsoN.

